Plug-and-play device for line loss investigation

Abstract

The invention provides a line loss checking plug-and-play device which comprises a main iron core and an auxiliary iron core hinged to the main iron core, the auxiliary iron core is provided with a reset assembly, the main iron core and the auxiliary iron core form a current induction ring, the current induction ring is wound with a winding, the winding is connected to a current acquisition module of a current meter, and the current acquisition module is connected with the reset assembly. The current acquisition module is in communication connection with the control end; according to the invention, high-altitude cables can be rapidly detected.

Description

Technical Field

[0001] The present invention relates to the technical field of power system inspection, in particular to a plug-and-play device for detecting line loss. Background Art

[0002] With the current rapid economic development, electricity consumption has increased significantly, and various types of electricity theft have become increasingly serious, impacting the achievement of various performance indicators for power supply companies. Electricity theft is characterized by concealment, dispersion, and diversity. Previously, thieves were primarily individuals and collective organizations, but now this phenomenon has diversified, with high-energy-consuming enterprises and some state-owned institutions also engaging in theft. The increase in the number of thefts has increased line losses, severely damaging the legitimate rights and interests of power supply companies and disrupting the normal supply and demand of electricity. The most primitive method of electricity theft involved running a wire directly in front of the meter or short-circuiting the incoming and outgoing wires of the meter box. Later, technical theft methods began to emerge, with voltage theft, current theft, and phase shifting being the more common ones. However, these methods still failed to meet the electricity needs of thieves. Currently, thieves have begun to promote high-tech theft, using high-frequency interference and strong magnetic interference to disrupt the normal measurement of electricity meters in order to achieve their goals. Anti-electricity theft personnel detect users' cables and track down illegally connected cables. They often use clamp-on ammeters to check and process the cables one by one. The clamp-on ammeter does not need to be electrically connected to the energy meter and the external power supply. It only needs to be looped around the cable to quickly and intuitively read the desired data. However, due to the large size of the clamp-on ammeter and its limited length, it is difficult to detect cables hidden deep in the wall cracks or hanging high in the air, thereby delaying the time for anti-electricity theft personnel to detect cables and track down illegally connected cables. In addition, the cables in old communities are often hung in a piled-up form. When a single cable needs to be tested, it is necessary to move the escalator and expose the target cable from the other cables stacked side by side. Therefore, it is not easy to directly achieve the convenience of clamping and testing a single cable with a commonly used clamp-on ammeter alone.

[0003] Existing technical solutions for detecting high-altitude cables include: Referring to a clamp-on ammeter with Chinese patent publication number CN114325036A, the clamp-on ammeter includes a first clamp having a first end and a second end; a second clamp having a third end and a fourth end, the third end slidingly engaging with the first end to cause the fourth end to open or close relative to the second end; a support module supporting the first and second clamps; a first drive module disposed on the support module for driving the third end to slide relative to the first end; and an ammeter, the first and second clamps being electrically connected to the ammeter, respectively. When the clamp-on ammeter is in use, the first drive module drives the first and third ends to slide relative to each other, causing the first and second clamps to open or close relative to each other. When the clamp-on ammeter is opened, the cable enters between the first and second clamps.

[0004] Reference is made to Chinese Patent Publication No. CN108120862A, a portable rapid electricity theft detection device and method. The portable rapid electricity theft detection device includes a clamp-on ammeter, an ammeter case, an insulating rod, and an insulating rod handle. The ammeter case is provided with a trigger block hingedly connected to the ammeter case, the ammeter case is also provided with a pulley, and the insulating rod handle is provided with an inner handle. The trigger block is connected to the inner handle via a pull cord that passes through the pulley and passes through the interior of the insulating rod.

[0005] The above solution controls the opening and closing of the clamp ammeter inlay by means of a traction rope or a motor. The structural load will also increase the overall weight of the device, and it is impossible to truly achieve plug-and-play rapid testing. Summary of the Invention

[0006] The present invention solves the problem that the prior art cannot achieve quick plug-and-play testing, and proposes a line loss investigation plug-and-play device that can quickly detect high-altitude cables.

[0007] In order to achieve the above objectives, the following technical solutions are proposed: A plug-and-play device for line loss investigation includes a main iron core and a secondary iron core hinged to the main iron core. The secondary iron core is provided with a reset assembly. The main iron core and the secondary iron core form a current induction loop. The current induction loop is wound with a winding. The winding is connected to a current acquisition module of an ammeter. The current acquisition module is communicatively connected to a control end.

[0008] The present invention includes a current induction loop and a current meter. The current induction loop includes a main iron core, a secondary iron core, and an insulating shell. The insulating shell encapsulates and wraps the main iron core. One end of the main iron core is hinged to one end of the secondary iron core, and the other end of the main iron core is clamped to the other end of the secondary iron core. The main iron core and the secondary iron core form a ring iron core. The secondary iron core is provided with a reset component. The reset component is arranged between the secondary iron core and the insulating shell. The secondary iron core maintains clamping contact with the main iron core under the action of the reset component. Under the action of the hinge, the secondary iron core can be opened up and down. The current meter is provided with a winding wound around the main iron core and a current acquisition module. The current acquisition module collects current information of the winding. The current acquisition module is connected to an external control terminal for communication, receives control information from the control terminal, and feeds back the collected current information to the control terminal.

[0009] The principle of the present invention is as follows: a current sensing loop is inserted into an overhead cable, which contacts the secondary core. Due to the weight and tension of the overhead cable, the current sensing loop moves upward, while the overhead cable remains relatively stationary. At this time, the secondary core opens inward, allowing the overhead cable to enter the current sensing loop until it reaches the bottom of the current sensing loop. The secondary core is reset by a reset assembly, and the main core and secondary core form a ring core. At this time, the control end sends a collection signal to the current collection module. The current collection module receives the collection signal and collects the current signal. After collection, it transmits the current signal to the control end. At this point, the test is completed. The current sensing loop only needs to be pulled downward, and the overhead cable contacts the secondary core. At this time, the secondary core opens outward. After the overhead cable is separated from the current sensing loop, the secondary core is reset by the reset assembly. The main core and secondary core form a ring core and wait for the next test. The present invention truly achieves plug-and-play fast testing during electricity theft inspections.

[0010] Preferably, the current acquisition module includes a control unit electrically connected to a current acquisition unit and a Bluetooth unit. The current acquisition unit acquires the current signal of the winding, and the current acquisition module communicates with the control terminal via Bluetooth via the Bluetooth unit. The control unit is electrically connected to a timing unit and a fault determination unit. The timing unit records the current signal acquisition time, and the fault determination unit determines whether the current signal has a fault.

[0011] The current acquisition module of the present invention includes a control unit, a current acquisition unit, a Bluetooth unit, a timing unit, and a fault determination unit. The control unit is electrically connected to the current acquisition unit, the Bluetooth unit, the timing unit, and the fault determination unit. The current acquisition module communicates with the control terminal via the Bluetooth unit. The timing unit is used to record the time of current signal acquisition in detail, obtaining a current signal with timing characteristics. Generally, a 15-minute average current is collected as the test current. The current acquisition unit is used to collect the current signal of the winding. The fault determination unit is used to detect whether there is a fault in the current signal. For example, if the current induction loop is not fully closed, resulting in an inaccurate test result, or if the overhead cable is located in the current induction loop, resulting in an inaccurate test result, the fault is fed back to the control terminal via the Bluetooth unit, promptly informing the tester to make relevant adjustments.

[0012] Preferably, the main iron core is encapsulated in an insulating shell, a limit baffle is provided in the current induction ring, the limit baffle is connected to the insulating shell through a plurality of second springs, and the limit baffle keeps the aerial cable near the center of the current induction ring.

[0013] The present invention features an insulating shell encapsulating the main iron core. The insulating shell is located within a current sensing loop and includes an arc-shaped retaining plate. The retaining plate is elastically connected to the insulating shell via a plurality of second springs. The retaining plate opens upward, retaining the aerial cable near the center of the current sensing loop. This improves the accuracy of current signal acquisition.

[0014] Preferably, one end of the main iron core is hinged to the auxiliary iron core, and the other end of the main iron core is interference fit with the auxiliary iron core.

[0015] The main body of the present invention is a circular ring with a notch, and slots are provided at both ends of the notch. The main body of the secondary core is matched with the notch of the main core to form a circular ring, including an arc segment and protrusions provided at both ends of the arc segment. One of the protrusions in the arc segment is hinged in the slot, and the other protrusion is fixed in the slot on the other side. The protrusions are provided with protrusions on the fixed protrusions, and the main core and the secondary core are interference-fitted through the protrusions. The purpose of this arrangement of the present invention is to ensure that the secondary core and the main core remain in a closed loop during testing.

[0016] Preferably, the reset component is a first spring connecting the secondary iron core and the insulating shell.

[0017] The reset component of the present invention is a first spring. The insulating shell is provided with an extension section near the hinge between the auxiliary iron core and the main iron core. One end of the first spring is connected to the extension section of the insulating shell, and the other end of the first spring is connected to the auxiliary iron core.

[0018] Preferably, one end of the first spring is connected to the insulating shell, and the other end of the first spring is connected to a position where the secondary iron core is close to the hinge with the main iron core.

[0019] The first spring of the present invention is connected to the position where the auxiliary iron core is close to the hinge with the main iron core, and reduces the resistance during insertion and removal through the lever principle, making testing easier.

[0020] Preferably, the distance from the connection between the first spring and the auxiliary iron core to the end where the auxiliary iron core and the main iron core are hinged is between one quarter and one third of the length of the auxiliary iron core body.

[0021] The present invention further optimizes the connection point between the first spring and the auxiliary iron core, and rationally utilizes the lever principle to reduce the insertion and removal resistance of the current induction ring.

[0022] The beneficial effects of the present invention are: 1. Plug and unplug quickly for testing; 2. Modular setting for easy storage and maintenance; 3. Utilization of the lever principle to reduce plug and unplug resistance, enabling easy testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the working principle of the present invention; Figure 3 is a cross-sectional view of the current induction ring structure of the present invention; Among them: 1. Current sensing ring; 2. Current meter; 11. Main iron core; 12. Auxiliary iron core; 13. Insulation shell; 14. Extension section; 15. First spring; 16. Limit baffle; 17. Second spring; 21. Current acquisition module; 22. Winding; 3. Control terminal; 111. Slot; 112. Hinge; 121. Bump; 122. Protrusion. DETAILED DESCRIPTION

[0024] Example 1: This embodiment proposes a line loss detection plug-and-play device, refer to Figure 1 , including a current sensing loop 1 and an ammeter 2. The current sensing loop 1 includes a main iron core 11, a secondary iron core 12, and an insulating shell 13. The insulating shell 13 encapsulates and wraps the main iron core 11. One end of the main iron core 11 is hinged to one end of the secondary iron core 12, and the other end of the main iron core 11 is clamped to the other end of the secondary iron core 12. The main iron core 11 and the secondary iron core 12 form a ring iron core. The secondary iron core 12 is provided with a reset component, which is arranged between the secondary iron core 12 and the insulating shell 13. The secondary iron core 12 maintains clamped contact with the main iron core 11 under the action of the reset component. Under the action of the hinge, the secondary iron core 12 can be opened up and down. The ammeter 2 is provided with a winding 22 wound around the main iron core 11 and a current acquisition module 21. The current acquisition module 21 collects current information of the winding 22. The current acquisition module 21 is connected to the external control terminal 3 for communication, receives control information from the control terminal 3, and feeds back the collected current information to the control terminal 3.

[0025] refer to Figure 2 The current acquisition module 21 of the present invention includes a control unit, a current acquisition unit, a Bluetooth unit, a timing unit, and a fault determination unit. The control unit is electrically connected to the current acquisition unit, the Bluetooth unit, the timing unit, and the fault determination unit. The current acquisition module 21 communicates with the control terminal 3 via the Bluetooth unit. The timing unit is used to record the time of current signal acquisition in detail, obtaining a current signal with a time series characteristic. Generally, a 15-minute average current is collected as the test current. The current acquisition unit is used to collect the current signal of the winding 22. The fault determination unit is used to detect whether there is a fault in the current signal. For example, if the current induction loop 1 is not fully closed, resulting in an inaccurate test result, or if an overhead cable is located in the current induction loop 1, resulting in an inaccurate test result, the fault is fed back to the control terminal 3 via the Bluetooth unit, so that the tester can make relevant adjustments in a timely manner.

[0026] refer to Figure 3The main body of the main iron core 11 of the present invention is a circular ring with a notch, and slots 111 are provided at both ends of the notch. The main body of the secondary iron core 12 is matched with the notch of the main iron core 11 to form a circular ring, including an arc segment 12 and protrusions 121 provided at both ends of the arc segment 12. One of the protrusions 121 of the arc segment 12 is hinged in the slot 111 by a hinge 112, and the other protrusion 121 is clamped in the slot 111 on the other side. A protrusion 122 is provided on the clamped and fixed protrusion 121, and the main iron core 11 is interference-fitted with the secondary iron core 12 through the protrusion 122. The purpose of this arrangement of the present invention is to keep the secondary iron core 12 and the main iron core 11 in a closed loop during testing.

[0027] The principle of the present invention is as follows: the current induction loop 1 is inserted into the aerial cable, and the aerial cable contacts the secondary iron core 12. Due to the deadweight of the aerial cable and its tensioning force, when the current induction loop 1 moves upward, the aerial cable can maintain a relatively stationary position. At this time, the secondary iron core 12 will open inward, and the aerial cable can enter the current induction loop 1 until the aerial cable enters the bottom of the current induction loop 1. The secondary iron core 12 is reset under the action of the reset component, and the main iron core 11 and the secondary iron core 12 form a ring iron core. At this time, the control end 3 sends a collection signal to the current collection module 21. The current collection module 21 collects the current signal after receiving the collection signal, and transmits the current signal to the control end 3 after the collection is completed. At this time, the test is over, and you only need to pull the current induction loop 1 downward, and the aerial cable contacts the secondary iron core 12. At this time, the secondary iron core 12 opens outward. After the aerial cable is separated from the current induction loop 1, the secondary iron core 12 is reset under the action of the reset component, and the main iron core 11 and the secondary iron core 12 form a ring iron core waiting for the next test. The present invention can truly achieve plug-and-play quick testing during electricity theft inspection.

[0028] Example 2: This embodiment adds a limit baffle 16 on the basis of embodiment 1 to improve the test accuracy, and proposes a plug-and-play device for line loss detection. Figure 1, including a current sensing loop 1 and an ammeter 2. The current sensing loop 1 includes a main iron core 11, a secondary iron core 12 and an insulating shell 13. The insulating shell 13 encapsulates and wraps the main iron core 11. One end of the main iron core 11 is hinged to one end of the secondary iron core 12, and the other end of the main iron core 11 is clamped to the other end of the secondary iron core 12. The main iron core 11 and the secondary iron core 12 form a ring iron core. The secondary iron core 12 is provided with a reset component. The reset component is arranged between the secondary iron core 12 and the insulating shell 13. The secondary iron core 12 maintains clamping contact with the main iron core 11 under the action of the reset component. Under the action of the hinge, the secondary iron core 12 can be opened up and down. The insulating shell 13 is located inside the current sensing loop 1 and is provided with a limit baffle 16 with an arc-shaped shape. The limit baffle 16 is elastically connected to the insulating shell 13 through a number of second springs 17. The limit baffle 16 opens upward to keep the aerial cable near the center of the current sensing loop 1. The purpose is to improve the accuracy of current signal acquisition. The current meter 2 includes a winding 22 wound around the main core 11 and a current acquisition module 21. The current acquisition module 21 collects current information from the winding 22. The current acquisition module 21 is in communication with an external control terminal 3, receives control information from the control terminal 3, and feeds the collected current information back to the control terminal 3.

[0029] refer to Figure 2 The current acquisition module 21 of the present invention includes a control unit, a current acquisition unit, a Bluetooth unit, a timing unit, and a fault determination unit. The control unit is electrically connected to the current acquisition unit, the Bluetooth unit, the timing unit, and the fault determination unit. The current acquisition module 21 communicates with the control terminal 3 via the Bluetooth unit. The timing unit is used to record the time of current signal acquisition in detail, obtaining a current signal with a time series characteristic. Generally, a 15-minute average current is collected as the test current. The current acquisition unit is used to collect the current signal of the winding 22. The fault determination unit is used to detect whether there is a fault in the current signal. For example, if the current induction loop 1 is not fully closed, resulting in an inaccurate test result, or if an overhead cable is located in the current induction loop 1, resulting in an inaccurate test result, the fault is fed back to the control terminal 3 via the Bluetooth unit, so that the tester can make relevant adjustments in a timely manner.

[0030] refer to Figure 3 The main body of the main iron core 11 of the present invention is a circular ring with a notch, and slots 111 are provided at both ends of the notch. The main body of the secondary iron core 12 is matched with the notch of the main iron core 11 to form a circular ring, including an arc segment 12 and protrusions 121 provided at both ends of the arc segment 12. One of the protrusions 121 of the arc segment 12 is hinged in the slot 111 by a hinge 112, and the other protrusion 121 is clamped in the slot 111 on the other side. A protrusion 122 is provided on the clamped and fixed protrusion 121, and the main iron core 11 is interference-fitted with the secondary iron core 12 through the protrusion 122. The purpose of this arrangement of the present invention is to keep the secondary iron core 12 and the main iron core 11 in a closed loop during testing.

[0031] The principle of the present invention is as follows: the current induction loop 1 is inserted into the aerial cable, and the aerial cable contacts the secondary iron core 12. Due to the deadweight of the aerial cable and its tensioning force, when the current induction loop 1 moves upward, the aerial cable can maintain a relatively stationary position. At this time, the secondary iron core 12 will open inward, and the aerial cable can enter the current induction loop 1 until the aerial cable enters the bottom of the current induction loop 1. The secondary iron core 12 is reset under the action of the reset component, and the main iron core 11 and the secondary iron core 12 form a ring iron core. At this time, the control end 3 sends a collection signal to the current collection module 21. The current collection module 21 collects the current signal after receiving the collection signal, and transmits the current signal to the control end 3 after the collection is completed. At this time, the test is over, and you only need to pull the current induction loop 1 downward, and the aerial cable contacts the secondary iron core 12. At this time, the secondary iron core 12 opens outward. After the aerial cable is separated from the current induction loop 1, the secondary iron core 12 is reset under the action of the reset component, and the main iron core 11 and the secondary iron core 12 form a ring iron core waiting for the next test. The present invention can truly achieve plug-and-play quick testing during electricity theft inspection.

[0032] Example 3: This embodiment improves the structure of the reset component on the basis of embodiment 1 and embodiment 2, and proposes a line loss detection plug-and-play device. Figure 1 , including a current induction ring 1 and an ammeter 2, the current induction ring 1 includes a main iron core 11, a secondary iron core 12 and an insulating shell 13, the insulating shell 13 encapsulates and wraps the main iron core 11, one end of the main iron core 11 is hinged to one end of the secondary iron core 12, and the other end of the main iron core 11 is clamped to the other end of the secondary iron core 12, the main iron core 11 and the secondary iron core 12 form a ring iron core, the secondary iron core 12 is provided with a reset component, the reset component is arranged between the secondary iron core 12 and the insulating shell 13, the secondary iron core 12 maintains clamping contact with the main iron core 11 under the action of the reset component, and the secondary iron core 12 can be opened up and down under the hinged action.

[0033] The reset component of the present invention is a first spring 15. An extension section 14 is provided near the hinge between the secondary iron core 12 and the main iron core 11 of the insulating shell 13. One end of the first spring 15 is connected to the extension section 14 of the insulating shell 13, and the other end of the first spring 15 is connected to the secondary iron core 12.

[0034] The first spring 15 of the present invention is connected to the auxiliary iron core 12 at a position close to the hinge with the main iron core 11, and reduces the resistance during insertion and removal through the lever principle, making testing easier.

[0035] The distance between the connection point between the first spring 15 and the auxiliary iron core 12 and the end where the auxiliary iron core 12 and the main iron core 11 are hinged is between one quarter and one third of the main body length of the auxiliary iron core 12 .

[0036] The present invention further optimizes the connection point between the first spring 15 and the auxiliary iron core 12 and rationally utilizes the lever principle to reduce the insertion and removal resistance of the current induction ring 1.

[0037] The insulating shell 13, located within the current sensing loop 1, is equipped with an arc-shaped limit baffle 16. This baffle 16 is elastically connected to the insulating shell 13 via a plurality of second springs 17. The baffle 16 opens upward, keeping the overhead cable near the center of the current sensing loop 1. This improves the accuracy of current signal acquisition. The current meter 2 includes a winding 22 wrapped around the main iron core 11 and a current acquisition module 21. This module collects current information from the winding 22. The current acquisition module 21 is in communication with the external control terminal 3, receiving control information from the control terminal 3 and feeding back the collected current information to the control terminal 3.

[0038] refer to Figure 2 The current acquisition module 21 of the present invention includes a control unit, a current acquisition unit, a Bluetooth unit, a timing unit, and a fault determination unit. The control unit is electrically connected to the current acquisition unit, the Bluetooth unit, the timing unit, and the fault determination unit. The current acquisition module 21 communicates with the control terminal 3 via the Bluetooth unit. The timing unit is used to record the time of current signal acquisition in detail, obtaining a current signal with a time series characteristic. Generally, a 15-minute average current is collected as the test current. The current acquisition unit is used to collect the current signal of the winding 22. The fault determination unit is used to detect whether there is a fault in the current signal. For example, if the current induction loop 1 is not fully closed, resulting in an inaccurate test result, or if an overhead cable is located in the current induction loop 1, resulting in an inaccurate test result, the fault is fed back to the control terminal 3 via the Bluetooth unit, so that the tester can make relevant adjustments in a timely manner.

[0039] refer to Figure 3 The main body of the main iron core 11 of the present invention is a circular ring with a notch, and slots 111 are provided at both ends of the notch. The main body of the secondary iron core 12 is matched with the notch of the main iron core 11 to form a circular ring, including an arc segment 12 and protrusions 121 provided at both ends of the arc segment 12. One of the protrusions 121 of the arc segment 12 is hinged in the slot 111 by a hinge 112, and the other protrusion 121 is clamped in the slot 111 on the other side. A protrusion 122 is provided on the clamped and fixed protrusion 121, and the main iron core 11 is interference-fitted with the secondary iron core 12 through the protrusion 122. The purpose of this arrangement of the present invention is to keep the secondary iron core 12 and the main iron core 11 in a closed loop during testing.

[0040] The principle of the present invention is as follows: the current induction loop 1 is inserted into the aerial cable, and the aerial cable contacts the secondary iron core 12. Due to the deadweight of the aerial cable and its tensioning force, when the current induction loop 1 moves upward, the aerial cable can maintain a relatively stationary position. At this time, the secondary iron core 12 will open inward, and the aerial cable can enter the current induction loop 1 until the aerial cable enters the bottom of the current induction loop 1. The secondary iron core 12 is reset under the action of the reset component, and the main iron core 11 and the secondary iron core 12 form a ring iron core. At this time, the control end 3 sends a collection signal to the current collection module 21. The current collection module 21 collects the current signal after receiving the collection signal, and transmits the current signal to the control end 3 after the collection is completed. At this time, the test is over, and you only need to pull the current induction loop 1 downward, and the aerial cable contacts the secondary iron core 12. At this time, the secondary iron core 12 opens outward. After the aerial cable is separated from the current induction loop 1, the secondary iron core 12 is reset under the action of the reset component, and the main iron core 11 and the secondary iron core 12 form a ring iron core waiting for the next test. The present invention can truly achieve plug-and-play quick testing during electricity theft inspection.

Claims

1. A plug-and-play device for line loss detection, characterized in that: The invention comprises a main iron core (11) and a secondary iron core (12) hinged to the main iron core (11), wherein the secondary iron core (12) is provided with a reset assembly, and the main iron core (11) and the secondary iron core (12) constitute a current induction loop (1), wherein the current induction loop (1) is wound with a winding (22), wherein the winding (22) is connected to a current acquisition module (21) of an ammeter (2), and wherein the current acquisition module (21) is communicatively connected to a control terminal (3).

2. The line loss detection plug-and-play device according to claim 1, characterized in that: The current acquisition module (21) includes a control unit, the control unit is electrically connected to a current acquisition unit and a Bluetooth unit, the current acquisition unit acquires the current signal of the winding (22), and the current acquisition module (21) performs Bluetooth communication with the control end (3) via the Bluetooth unit.

3. The line loss detection plug-and-play device according to claim 2, characterized in that: The control unit is electrically connected to a timing unit and a fault determination unit. The timing unit records the current signal acquisition time. The fault determination unit determines whether there is a fault in the current signal.

4. The line loss detection plug-and-play device according to claim 1, characterized in that: The main iron core (11) is encapsulated in an insulating shell (13); a limit baffle (16) is provided in the current induction ring (1); the limit baffle (16) is connected to the insulating shell (13) via a plurality of second springs (17); and the limit baffle (16) keeps the aerial cable near the center of the current induction ring (1).

5. The line loss detection plug-and-play device according to claim 1, characterized in that: One end of the main iron core (11) is hinged to the auxiliary iron core (12), and the other end of the main iron core (11) is interference-fitted to the auxiliary iron core (12).

6. A line loss detection plug-and-play device according to claims 1-5, characterized in that: The reset component is a first spring (15) connecting the auxiliary iron core (12) and the insulating shell (13).

7. The line loss detection plug-and-play device according to claim 6, characterized in that: One end of the first spring (15) is connected to the insulating shell (13), and the other end of the first spring (15) is connected to a position of the auxiliary iron core (12) close to the hinge with the main iron core (11).

8. The line loss detection plug-and-play device according to claim 7, characterized in that: The distance between the connection point between the first spring (15) and the auxiliary iron core (12) and the end where the auxiliary iron core (12) and the main iron core (11) are hinged is between one quarter and one third of the main body length of the auxiliary iron core (12).

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